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edta对波士顿蕨吸收hg的影响及其光合响应

DOI: 10.3724/SP.J.1145.2011.00219, PP. 219-222

Keywords: 波士顿蕨,叶绿素荧光,hg,edta,植物修复,光合作用

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Abstract:

采用水培实验方法研究edta对波士顿蕨吸收和转移hg的影响,以及波士顿蕨对hg及hg和edta胁迫下光合系统ii(psii)的响应.结果显示:波斯顿蕨的根部能富集hg,加入edta可以提高hg从其根部转移到地上部分.单独hg处理略微抑制了叶绿素的合成,hg或hg与edta处理对叶绿素的合成没有明显的影响.hg或hg与edta对植物的光合作用产生一定程度的胁迫作用.hg单独处理或hg与edta一起处理都导致了植物光合效能指数下降,干扰光系统ii中的能量转移,将部分反应中心被转化为能耗中心,在一定程度上抑制了光系统ii中的电子传递.表4参26

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